HACCP Hazard Identification & Risk Assessment 5 — Questions and Answers
Question 1: Which step in the preliminary HACCP tasks directly informs hazard identification by listing all inputs and processing steps?
- Establishing critical limits
- Constructing the process flow diagram (Correct answer)
- Setting up verification activities
- Defining corrective actions
Correct answer: Constructing the process flow diagram
The process flow diagram lists every ingredient, process step, and output, giving the HACCP team a structured basis for identifying where hazards may enter or increase.
Question 2: Mercury contamination in large predatory fish such as swordfish is best classified as which HACCP hazard type?
- Biological
- Physical
- Chemical (Correct answer)
- Radiological
Correct answer: Chemical
Mercury is a heavy metal that bioaccumulates in fish tissue and is classified as a chemical hazard in HACCP.
Question 3: A beverage company uses a water supply that occasionally shows elevated nitrate levels. To assess this hazard, which factor should drive the significance determination most heavily?
- The color and taste of the water
- Severity of nitrate toxicity (especially methemoglobinemia in infants) and likelihood based on water testing history (Correct answer)
- The cost of water treatment equipment
- Whether competitors use the same water source
Correct answer: Severity of nitrate toxicity (especially methemoglobinemia in infants) and likelihood based on water testing history
Nitrate causes methemoglobinemia in infants (high severity) and historical water data determines likelihood — both factors together define significance.
Question 4: Which pathogen is the primary biological hazard concern in low-acid canned foods and drives the thermal process validation requirements in those HACCP plans?
- Salmonella Typhimurium
- Clostridium botulinum (Correct answer)
- Escherichia coli O157:H7
- Listeria monocytogenes
Correct answer: Clostridium botulinum
Clostridium botulinum produces heat-resistant spores and a deadly neurotoxin in anaerobic low-acid environments, making it the target pathogen for canned food thermal processing.
Question 5: When a HACCP team evaluates a raw ingredient from a new supplier, which action best supports thorough hazard identification?
- Assume the ingredient carries the same hazards as ingredients from current suppliers
- Request a Certificate of Analysis, review supplier audit data, and consult scientific literature on hazards associated with that ingredient (Correct answer)
- Only conduct hazard analysis after the first delivery is received
- Rely solely on the supplier's verbal assurances about product safety
Correct answer: Request a Certificate of Analysis, review supplier audit data, and consult scientific literature on hazards associated with that ingredient
Reviewing COAs, supplier audit results, and published hazard data provides a science-based foundation for identifying hazards in new raw materials.
Question 6: Which of the following scenarios represents a 'radiological' hazard in food production — the least common HACCP hazard category?
- Irradiation of spices using an approved dose for pathogen reduction
- Contamination of crops with radioactive isotopes from fallout near a nuclear facility (Correct answer)
- UV light treatment of juice for pathogen reduction
- Use of X-ray equipment to detect bone fragments in meat
Correct answer: Contamination of crops with radioactive isotopes from fallout near a nuclear facility
Radioactive isotope contamination from nuclear fallout is a true radiological hazard, whereas approved irradiation and UV/X-ray detection are controlled technologies, not contamination hazards.
Question 7: A HACCP team must decide whether lubricant oil leaking from overhead equipment onto an open food line is a significant hazard. Which combination of factors makes this significant?
- Low severity of food-grade oils and low likelihood of leaks
- High likelihood due to visible leak points and high severity if non-food-grade lubricant is used (Correct answer)
- The decision depends only on whether the leak has caused illness in the past
- It is never significant because lubricants are regulated by OSHA, not FDA
Correct answer: High likelihood due to visible leak points and high severity if non-food-grade lubricant is used
Visible overhead leak points make contamination likely, and non-food-grade lubricants can cause serious chemical harm — both factors elevate significance.
HACCP Hazard Identification & Risk Assessment 5
Which step in the preliminary HACCP tasks directly informs hazard identification by listing all inputs and processing steps?